Cardano Proposes Quantum Protection for Existing ADA Wallets
On August 23, Cardano advanced two security proposals for community review. One of these outlines a method to protect ADA wallets from future quantum computers without requiring users to change their addresses. This proposal, CIP-0197, suggests integrating a zero-knowledge proof with existing Ed25519 wallets instead of completely replacing their cryptography. Currently an early-stage draft under discussion, it is intended as an interim measure, not a full post-quantum migration.
Details of the two proposals
Indeed, these proposals emerged after Robert Phair, a Cardano Improvement Proposal editor, shared a review snapshot from the official Cardano account. Cardano Foundation records confirm CIP-0197 and CPS-0034 as candidates approved on August 18, now open for technical feedback.
CIP-0197 specifically addresses a vulnerability: when a wallet spends, its public key becomes visible on-chain. Theoretically, a quantum computer capable of running Shor’s algorithm at scale could derive the private key from this public key. The proposal adds a zero-knowledge proof linked to the wallet seed, while keeping existing keys, addresses, and derivation paths unchanged. The initial phase keeps classical signatures on-chain, with wallets, exchanges, and indexers checking the new proofs off-chain. Moving this verification into the node would occur later and would necessitate a consensus change and smaller proof sizes.
CPS-0034 is unrelated to quantum threats. It proposes property-based conformance tests for Plutus Core. These tests would allow teams developing alternative Cardano nodes to verify that their evaluators match the reference implementation.
Missing information and timeline
Neither proposal includes an implementation date, funding figures, or performance data. Both are still under review and do not yet represent network changes. The zero-knowledge approach described is not equivalent to NIST post-quantum cryptography under FIPS 203, 204, or 205. Cardano’s own reviewers acknowledge that more work will be required before the network can replace its vulnerable primitives, which would constitute the actual migration.
It’s also important to note that no cryptographically relevant quantum computer exists today. This work is a proactive measure against a future threat. NIST estimates the arrival of such a machine anywhere from around 2030 to several decades out, and cautions that cryptographic migrations themselves take years. Cardano founder Charles Hoskinson stated in May 2026 that he believed there was a better than even chance of quantum computers breaking modern cryptography before 2033, though this is his personal projection.
These proposals are part of the Cardano Vision 2026, a research roadmap announced in June 2026, which includes 15 initiatives across six areas. Post-quantum security is one of these areas. Any coverage linking this review to ADA price action or ETF flows should be disregarded, as these proposals do not alter the token’s mechanics.